import java.awt.Dimension;
import java.awt.Rectangle;
import java.awt.Robot;
import java.awt.Toolkit;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
/*******************************************************************

* 该JavaBean可以直接在其他Java应用程序中调用，实现屏幕的"拍照"

* This JavaBean is used to snapshot the GUI in a

* Java application! You can embeded

* it in to your java application source code, and us

* it to snapshot the right GUI of the application

* @see javax.ImageIO

* @author liluqun (liluqun@263.net)

* @version 1.0

*

*****************************************************/
public class GuiCamera
{
      private String fileName; //文件的前缀
      private String defaultName = "GuiCamera";
      static int serialNum=0;
      private String imageFormat; //图像文件的格式
      private String defaultImageFormat="png";
      Dimension d = Toolkit.getDefaultToolkit().getScreenSize();
      /****************************************************************

     * 默认的文件前缀为GuiCamera，文件格式为PNG格式

     * The default construct will use the default

     * Image file surname "GuiCamera",

     * and default image format "png"

     ****************************************************************/
      public GuiCamera() {
            fileName = defaultName;
            imageFormat=defaultImageFormat;
      }
      /****************************************************************

     * @param s the surname of the snapshot file

     * @param format the format of the  image file,

     * it can be "jpg" or "png"

     * 本构造支持JPG和PNG文件的存储

     ****************************************************************/
      public GuiCamera(String s,String format) {
            fileName = s;
            imageFormat=format;
      }
      /****************************************************************

     * 对屏幕进行拍照

     * snapShot the Gui once

     ****************************************************************/
      public void snapShot() {
            try {
                  //拷贝屏幕到一个BufferedImage对象screenshot
                  BufferedImage screenshot = (new Robot()).createScreenCapture(new
                  Rectangle(0, 0, (int) d.getWidth(), (int) d.getHeight()));
                  serialNum++;
                  //根据文件前缀变量和文件格式变量，自动生成文件名
                  String name=fileName+String.valueOf(serialNum)+"."+imageFormat;
                  File f = new File(name);
                  System.out.print("Save File "+name);
                  //将screenshot对象写入图像文件
                  ImageIO.write(screenshot, imageFormat, f);
                  System.out.print("..Finished!\n");
            }
            catch (Exception ex) {
                  System.out.println(ex);
            }
      }
      public static void main(String[] args)
      {
            GuiCamera cam= new GuiCamera("d:\\Hello", "png");//
            cam.snapShot();
      }
}